Some of my Catalyst 2950G-48 switch have following error message :
Oct 30 16:03:15.470: %SNMP-3-AUTHFAIL: Authentication failure for SNMP req from host 172.16.6.250
172.16.6.250 is Ciscoworks 2000 server ( version 2.5.1 ). The community string setting at Catalyst 2950G-48 switch and Ciscoworks are correct. Can you please advise me to identify the problem?